1757. Nisaetus cirrhatus ceylanensis

(1757) Nisaetus cirrhatus ceylanensis (Gmelin).
THE CEYLON CRESTED HAWK-EAGLE.
Spizaetus cirrhatus ceylanensis, Fauna B. I., Birds, 2nd ed. vol. v. p. 86.
Limnaetops cirrhatus cirrhatus ceylanensis, ibid. vol. viii, p. 685.
This small form of Nisaetus is confined to Ceylon and to the South of Travancore, where Stewart found it to be very numerous.
In Ceylon Legge records that “it breeds in February and March in the forests of the Southern Province of Ceylon, building in the former and batching its single young one about the middle of the latter month. It selects a tall forest-tree, generally a bora (Diptero¬carpus zeylanica), and constructs a massive fabric of large sticks in a fork near the top. I have never heard of more than one young bird being reared.”
Stewart and Bourdillon, the former of whom took many nests in Travancore, describe the nesting as exactly like that of the typical form. Stewart records finding nests from the foot-hills up to about 2,500 feet, generally built on huge forest-trees standing in both evergreen and deciduous forest. The birds are very cowardly and make no attempt to defend their eggs against human beings, but they are very hard to drive from their nests, and Stewart on one occasion took three eggs, one after another, from the same nest, yet the bird still returned to it even after the third bad been taken.
Only one egg is laid, generally in January and February, but Stewart has taken eggs from early December to the end of March.
The eggs cannot be distinguished from those of the Indian race hut, as a whole, are even more feebly marked.
Twenty-four eggs average 61.3 x 49.8 mm. : maxima 70.3 x 50.6 and 62.8 x 54.1 mm. ; minima 57.5 x 45.1 mm.

BookTitle: 
The Nidification Of Birds Of The Indian Empire
Reference: 
Baker, Edward Charles Stuart. The nidification of birds of the Indian Empire. Vol. 4. 1935.
Title in Book: 
1757. Nisaetus cirrhatus ceylanensis
Spp Author: 
Gmehn.
Book Author: 
Edward Charles Stuart Baker
CatNo: 
1757
Year: 
1935
Page No: 
64
Common name: 
Changeable Hawk Eagle
M_ID: 
2726
M_SN: 
Nisaetus cirrhatus ceylanensis
Volume: 
Vol. 4
Term name: 
id: 
14937

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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith